Resilience in optical networks has traditionally relied on redundancy and pre-planned recovery strategies, both of which assume a certain level of disaster predictability. However, recent environmental changes such as climate shifts, the evolution of communication services, and rising geopolitical risks have increased the unpredictability of disasters, reducing the effectiveness of conventional resilience approaches. To address this unpredictability, this paper introduces the concept of agile resilience, which emphasizes dynamic adaptability across multiple operators and layers. We identify key requirements and challenges, and present enabling technologies for the realization of agile resilience. Using a field-deployed transmission system, we demonstrate rapid system characterization, optical path provisioning, and database migration within six hours. These results validate the effectiveness of the proposed enabling technologies and confirm the feasibility of agile resilience.

翻译：光网络的弹性传统上依赖于冗余和预先规划好的恢复策略，这两者都假定灾难具有一定程度的可预测性。然而，最近的环境变化，如气候变化、通信服务的演进以及地缘政治风险的上升，增加了灾难的不可预测性，降低了传统弹性方法的有效性。为应对这种不可预测性，本文引入了敏捷弹性的概念，其强调跨多个运营商和多个层次的动态适应性。我们识别了关键需求和挑战，并提出了实现敏捷弹性的使能技术。利用一个现场部署的传输系统，我们在六小时内演示了快速系统表征、光路供应和数据库迁移。这些结果验证了所提出的使能技术的有效性，并证实了敏捷弹性的可行性。